3-4 pm Friday 26 October 2012
Campus Heart_N76 room 1.09
Associate Prof Jacky Croke
Fluvial Geomorphologist,
Abstract:
Understanding
river form and processes is essential to the effective protection and
management of these ecosystems from a geomorphic, ecological,
hydrological and engineering perspective. River form and processes are
known to vary widely in space and time. As a result, the evolution of river
science has seen the emergence of a number of conceptual frameworks which have
been used to characterise the ‘typical’ form and process of rivers. Examples
include downstream hydraulic geometry (DHG), the river continuum concept (RCC),
sediment links and more recently self-organisation and self-organised
criticality (SOC). The data required to assess these frameworks is often
lacking especially at the basin-scale and, as a result, our knowledge of river
form and process is often a product of limited measurements and theoretical
predictions. Emerging technologies and the more routine availability
of high-resolution, remotely-sensed data such as Light Detection and
Raging (LiDAR) and high resolution Digital Elevation Models (DEMs) means that
geomorphology is now well-placed to populate and test some of these theories.
This
seminar is a theoretical look at the form of geomorphic response which occurred
during the catastrophic Locker Creek flood of January 2011. Multi-temporal
LiDAR data and high resolution DEMs are used to examine the resultant form and
processes of river adjustment. Specifically the seminar examines evidence for
such concepts as ‘self-organisation’ and ‘non-linearity’ of river response, and
concludes with some implications for river management.
Speaker: A/Prof Jacky Croke is a fluvial geomorphologist at the
--
ARI Events
Australian Rivers Institute
Nathan Campus
http://www.rivers.edu.au/
ari-events@griffith.edu.au
Ph. 07 3735 7681
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